A three-dimensional multi-scale computational homogenisation framework is developed for the prediction of nonlinear micro/meso-mechanical response of the fibre-reinforced polymer (FRP) composites. Two dominant damage mechanisms, i.e. matrix elasto-plastic response and fibre-matrix decohesion are considered and modelled using a non-associative pressure dependent paraboloidal yield criterion and ...

Long-term bed-rest is used to simulate the effect of spaceflight on the human body and test different kinds of countermeasures. The 2nd Berlin BedRest Study (BBR2-2) tested the efficacy of whole-body vibration in addition to high-load resisitance exercise in preventing bone loss during bed-rest. Here we present the protocol of the study and discuss its implementation. Twenty-four male subjects ...

In this paper, the yield behavior of closed-cell foams under multiaxial load conditions is investigated via finite element analysis on representative volume (RVE) scale by using regular Kelvin RVE and random models RVE, respectively. Several different definitions are considered in study. By benchmarking simulations with experimental data literature, it shown that elastic energy criterion to be ...

This is the second paper in a series concerned with the precise characterization of the elastic fields due to inclusions embedded in a finite elastic medium. In this part, an exact and closed form solution is obtained for the elastic fields of a circular inclusion embedded in a finite circular representative volume element (RVE), which is subjected to the traction (Neumann) boundary condition. ...

The paper presents a comparative analysis of methods and results calculating the physical mechanical characteristics single-layered multi-layered polymer composite materials (PCM). object study is which consists epoxy binder carbon fiber reinforcements. principle multiscale modelling applied to determine composite. Within framework this study, representative volume element (RVE), structure corr...

Glass fibers reinforcing composites (GFRC) are the most common industrial materials due to their low weight and superior strength. Microstructure modeling provides a practical approach for predicting behavior of composite based on constituent's property. The mechanical properties play significant role in various applications such as aviation, marines, vehicles industries. In this study, microst...

We present a multiscale method for the simulation of large viscoelastic deformations and show its applicability to biological tissue such as plant tissue. At the microscopic level we use a particle method to model the geometrical structure and basic properties of individual cells. The cell fluid, modeled as a viscoelastic fluid by means of Smoothed Particle Hydrodynamics (SPH) is enclosed in an...

We examined data on the mass, area and myocardial abnormality (scar or infarction) of the right ventricular free wall (RVFW) from 1500 consecutive dissections of hearts that came to autopsy. There were 447 hearts with associated coronary and ischemic heart disease (CAD) and 826 without CAD. RVFW mass was used as an index of hypertrophy (RVH) and RVFW area was used as an index of dilatation (RVD...

This work is concerned with the precise characterization of the elastic fields due to a spherical inclusion embedded within a spherical representative volume element (RVE). The RVE is considered having finite size, with either a prescribed uniform displacement or a prescribed uniform traction boundary condition. Based on symmetry and group theoretic arguments, we identify that the Eshelby tenso...

Carbon nanotubes (CNTs) possess extremely high stiffness, strength and resilience, and may provide the ultimate reinforcing materials for the development of nanocomposites. In this paper, the effective mechanical properties of CNTbased composites are evaluated using a 3-D nanoscale representative volume element (RVE) based on continuum mechanics and using the finite element method (FEM). Formul...